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Category:   Application (Instant Messaging/IRC/Chat)  >   Microsoft Skype for Business Vendors:   Microsoft
Microsoft Skype for Business Lets Remote Authenticated Users Gain Elevated Privileges
SecurityTracker Alert ID:  1039530
SecurityTracker URL:
CVE Reference:   CVE-2017-11786   (Links to External Site)
Date:  Oct 10 2017
Impact:   Disclosure of authentication information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2016
Description:   A vulnerability was reported in Microsoft Skype for Business. A remote authenticated user can gain elevated privileges.

A remote authenticated user can create a specially crafted profile image and invite the target user to an instant message session to obtain an authentication hash from the target user's account that can be reused.

Jerry Decime, Hewlett Packard Enterprise reported this vulnerability.

Impact:   A remote authenticated user can access to the target user's account.
Solution:   The vendor has issued a fix.

The Microsoft advisories are available at:

Vendor URL: (Links to External Site)
Cause:   Authentication error
Underlying OS:  Windows (2008), Windows (2012)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 10 2017 (Microsoft Issues Fix for Microsoft Lync) Microsoft Skype for Business Lets Remote Authenticated Users Gain Elevated Privileges
Microsoft has issued a fix for Microsoft Lync.

 Source Message Contents

[Original Message Not Available for Viewing]

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